1 /* 2 * Copyright (C) 2018 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17 #ifndef ANDROID_AAUDIO_FLOW_GRAPH_H 18 #define ANDROID_AAUDIO_FLOW_GRAPH_H 19 20 #include <memory> 21 #include <stdint.h> 22 #include <sys/types.h> 23 #include <system/audio.h> 24 25 #include <aaudio/AAudio.h> 26 #include <audio_utils/Balance.h> 27 #include <flowgraph/ClipToRange.h> 28 #include <flowgraph/ManyToMultiConverter.h> 29 #include <flowgraph/MonoBlend.h> 30 #include <flowgraph/MonoToMultiConverter.h> 31 #include <flowgraph/MultiToManyConverter.h> 32 #include <flowgraph/RampLinear.h> 33 34 class AAudioFlowGraph { 35 public: 36 /** Connect several modules together to convert from source to sink. 37 * This should only be called once for each instance. 38 * 39 * @param sourceFormat 40 * @param sourceChannelCount 41 * @param sinkFormat 42 * @param sinkChannelCount 43 * @param useMonoBlend 44 * @param audioBalance 45 * @param channelMask 46 * @param isExclusive 47 * @return 48 */ 49 aaudio_result_t configure(audio_format_t sourceFormat, 50 int32_t sourceChannelCount, 51 audio_format_t sinkFormat, 52 int32_t sinkChannelCount, 53 bool useMonoBlend, 54 float audioBalance, 55 bool isExclusive); 56 57 void process(const void *source, void *destination, int32_t numFrames); 58 59 /** 60 * @param volume between 0.0 and 1.0 61 */ 62 void setTargetVolume(float volume); 63 64 /** 65 * @param audioBalance between -1.0 and 1.0 66 */ 67 void setAudioBalance(float audioBalance); 68 69 /** 70 * @param numFrames to slowly adjust for volume changes 71 */ 72 void setRampLengthInFrames(int32_t numFrames); 73 74 private: 75 std::unique_ptr<FLOWGRAPH_OUTER_NAMESPACE::flowgraph::FlowGraphSourceBuffered> mSource; 76 std::unique_ptr<FLOWGRAPH_OUTER_NAMESPACE::flowgraph::MonoBlend> mMonoBlend; 77 std::unique_ptr<FLOWGRAPH_OUTER_NAMESPACE::flowgraph::ClipToRange> mClipper; 78 std::unique_ptr<FLOWGRAPH_OUTER_NAMESPACE::flowgraph::MonoToMultiConverter> mChannelConverter; 79 std::unique_ptr<FLOWGRAPH_OUTER_NAMESPACE::flowgraph::ManyToMultiConverter> 80 mManyToMultiConverter; 81 std::unique_ptr<FLOWGRAPH_OUTER_NAMESPACE::flowgraph::MultiToManyConverter> 82 mMultiToManyConverter; 83 std::vector<std::unique_ptr<FLOWGRAPH_OUTER_NAMESPACE::flowgraph::RampLinear>> mVolumeRamps; 84 std::vector<float> mPanningVolumes; 85 float mTargetVolume = 1.0f; 86 android::audio_utils::Balance mBalance; 87 std::unique_ptr<FLOWGRAPH_OUTER_NAMESPACE::flowgraph::FlowGraphSink> mSink; 88 }; 89 90 91 #endif //ANDROID_AAUDIO_FLOW_GRAPH_H 92